Drilling-machine



W. T. SEARS.

DRILLING MACHINE.

APPLICATION FILED mm: 19. I919.

Patentd Mar. 22, 1921.

WMTSW arm by the dr1ll head andspin UNITED STATES PATENT OFFICE.

WILLARD '1. SEARS, OI. MONTCLAIB, NEW JERSEY, ASSIGNOR TO l IILEQ-BEMENT- POND COMPANY, 01' NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

DRILLING-MACHINE.

Specification of Letters fatent.

Patented Mar. 22, 1921.

Application filed June a, 1919. Serial No. 305,301.

of New Jersey, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specifica-.

tion. This. invention relates to radial drilling machines of the type in which the saddle is longitudinall movable along the horizontal whic it is supported and in which le are angularly adjustable on the saddle.

the invention this mechanism includes a hand wheel normall located in a convenient position such terferes with the angular adjustment of the spindle to certain unusual but occasionally necessa positions. The hand wheel is menu so that it can be moved, preferably ivotally, so as to permit the required spind e adjustments and nevertheless remain operative although in a less convenientposition. Bymy invention, I also provide certain advantageous structural features of im rovement.

y n the accompanying drawings I have shown the invention in a preferred form, but it will be understood that it may be otherwise embodied and that the drawings are not to be construed as limiting or defining the scope of the invention, the accompanying claims being relied upon for that purpose.

Of the drawings:

Figure 1 is a side view of a radial drilling machineembodyin the invention.

ig. 2 isa sectiona view through the line 2-2 of Fig. 1.

Fig. 3 is a fragmentar sectional view through the lines 3-3 of *igs. 2 and 4.

Fig. 4 is a sectional view through the line 4-4 of Fig. 2.

The dril ing machine shown consists of a main column 1 mounted on a base 2 so as to allow angular movement about avertical axis. The column consists of two parallel parts which support a carrier frame 3 in such a way as to permit vertical adjustment. On one side of the frame 3 is secured a i casing 4 containing the gearing for speed One ob ect of the invention is to provide an improved mechanism for effecting the movement of the saddle along the arm. In accordance with t at it incidentallyf in-' two so arate guideways 14 and 15 which are is engaged by control and carrying an electric motor 5. On the opposite s1de, the arm 6 is secured and a main arm shaft 7 extends longitudinally of the arm.. Preferably this arm is angularly adjustable about the axis of the shaft 7.

A saddle'8 is carried by the arm Gin such a way as to allow longitudinal movement along the arm. A drill head 9 is secured to the saddle 8 and a spindle 10 is ro'tatably relative to the saddle 8 a out a horizontal axis perpendicular to the axis of shaft 7. A means is provided for controlling this adjustment, preferably consisting of a vertical shaft ll'rotatably mounted on the saddle 8, a worm 12 secured to the shaft and a circular series of gear teeth 13 formed on the a head and adapted to mesh with the worm. This construction is fully described in my copending application for dri1ling machines, Serial No. 206,780 filed December 12th, 1917.

Preferably, the arm 6 is provided with out 0 vertical alinement with each other, the guideway 14 projecting out farther than 15. The saddle 8 is constructed to engage these guideways and the weight of the saddle and the drill head is carried by an antifriction means such as the inclined rollers 16. This construction is set forth in my copending application for saddle and head supporting mechanism for drilling machines, Serial No. 240,859 filed July 20th, 1918.

A means for locking-the saddle against longitudinal movement along the arm is provided. Preferably this comprises a rear surface 17 of the lower guideway 15 which one or more shoes 18 carried by the saddle. The shoe is held in place by a boltwhi'ch may be'tightened by a hand lever 19 drawing the shoe into firm en agement with the surface 17 and locking t e saddle against motion.

mounted on the head. The spindle is ro- A mechanism is provided to enable the operator to easily move the saddle and drill head along the arm, this mechanism comprising a rack 20 secured to the arm 6 and a meshing pinion 21 secured to or formed as a part of a shaft 22. The shaft 22 is rotatably mounted in suitable bearings in the saddle 8 and is approximately vertical, but it may be slightly inclined as shown, the rack being similarly inclined.

Forrotating the shaft 22, there is provided a second shaft 23 which is preferably approximately horizontal although it may be inclined so as to be perpendicular to the shaft 22. The shaft 23 is preferably pivotally movable about the axis of the shaft 22 and suitable means is provided for operatively connecting the two shafts. As illustrated, this means consists of two meshing spiral gears 24 and 25. These gears are located in a casing 26 which is movable about the axis of the shaft 22 and which also provides a bearing for the shaft 23. A hand wheel 27 is secured to the shaft 23 for turning it and for thus turning the shaft 22 and moving the saddle. In order to provide for the maximum convenience of the operator, the hand wheel is located in a position such that incidentally it interferes with the angular adjustment of the spindle 10. It will be understood however that in the usual and ordinary operation of the machine the drilling is done with the drill spindle substantially vertical in which position the hand wheel 27 in its most convenient position, illustrated in Figs. 1 and2, in no way interferes with the operation of the machine.

A means is provided for locking the easing 26 against rotative motion about the axis of the shaft 22. Preferably, this means comprises a flange 28 with a slot 29 cut therein in the arc of a circle with its center on the axis of the shaft 22. A bolt 30 passes through this slot and is threaded to fit into a tapped hole 31 in the saddle. By tightening the bolt, the flange 28and hence the easin 24 is locked against rotation.

I rom the foregoing description, it will be seen that shaft 23, the hand wheel 27 secured thereto, the gear 25 and the casing 26 may be pivotally adjusted about the axis of shaft 22. As the axis of the gear 24 is coincident with the axis of rotation, the gears 25 and -241.will remain meshed in operative relation. By means of the .bolt 30, the casing and associated parts including the hand wheel may be locked in any one of a number of positions and the mechanism remains operative in all ositions.

Ordinarily, the hand wheel is used in the position shown in the drawing which is within easy reach of the operator and reatly 'more convenient than would be a ban wheel otherwise positioned, as for instance one secured directly to the shaft 22. However,

when it is desired to an'gularly adjust the drill head in relation to the saddle as previ ously described, the hand wheel would interfere with movement of the spindle to certain positions. In such cases, the hand wheel may be moved to a position as shown by the dot-and-dash lines of Fig. 2 and locked and operated in that position.

One advantage of this construction is that for the usual operating conditions the hand wheel occupies a position affording the greatest convenience; but when this position interferes with the drill .spindle the hand wheel may be temporarily moved to a less convenient but still operative position.

What I claim is:-

1. In a radial drilling machine, the combination of a horizontal arm, a saddle slidably mounted thereon, mechanism including a hand Wheel for moving the saddle along the arm, and means whereby the position of the hand wheel relative to the saddle may be changed without impairing the operativeness of the said mechanism.

2. In a radial drilling machine, the combination of a horizontal arm, a saddle slidably mounted thereon, mechanism including a hand wheel for moving the saddle along the arm, and means whereby the hand wheel may be pivotally adjusted to another position relative to the saddle without impairing the operativeness of the said mechanism.

3. In a radial drilling machine, the combination of a horizontal arm, a saddle slidably mounted thereon, mechanism including a hand wheel for moving the saddle alon the arm, means whereby the position of the hand wheel relative. to the saddle may be changed without impairing the operativeness of the said mechanism, and a device for locking the hand wheel in its adjusted position.

4. In a radial drillingmachine, the combination of a horizontal arm, a saddle slidably mounted thereon, mechanism for moving the saddle along the arm including a hand wheel, two rotatably mounted and operatively connected shafts, means whereby the hand wheel is fixedly mounted on one shaft and pivotally adjustable to different positions about the axis of the second shaft, and an operative connection between the second shaft and the arm.

5. In a radial drilling machine, the combination of a horizontal arm, a saddle slidably mounted thereon, mechanism for moving the saddle along the arm including two rotatabl mounted shafts, a spiral gear on one sha a bracket surrounding such shaft and spiral gear and supporting the second shaft with a spiral gear thereon in mesh with the first spiral gear, a hand wheel on the second-shaft, the bracket being adjustable about the first shaft and spiral gear, means for locking the bracket in adjusted eratively connected shafts, means whereby the hand wheel is fixedly mounted on one shaft and pivotally adjustable to different positions about the axis of the second shaft, a pinion secured to said second shaft, and a rack secured to the arm and meshing with the pinion.

7. In a radial drilling machine, the combination of a horizontal arm, a saddle slidably mounted thereon, a drill head on the saddle and angularly adjustable therewith about a horizontal axis, a spindle rotatably mounted on the head, mechanism for moving the saddle along the arm comprisin two rotatably mounted shafts, a hand wheef, and means whereby the position thereof relative to the saddle may be changed in order to avoid interference between the hand wheel and the spindle which certain positions of the head would otherwise cause.

8. In a radial drilling machine, the combination of a horizontalv arm, a saddle slidably mounted thereon, a drill head on the saddle and angularly adjustable therewith about a horizontal axis, a spindle rotatably mounted on the'head, mechanism for moving the saddle along the arm comprising a hand wheel normally in a position in the path of the spindle when the latter is adjusted angularly, and means whereby the hand wheel may be moved out of the said path and nevertheless remain operative.

9. In a radial drilling machine, the combination of a horizontal arm, a saddle slidably mounted thereon, adrill head on the saddle and angularly adjustable therewith about a horizontal axis, a spindle rotatably mounted on the head, mechanism for moving the saddle along the arm comprising a hand wheel normally in a position in the path of the spindle when the latter is adusted angularly, means whereby the hand wheel may be pivotally adjusted to another position out of the said path and nevertheless remain operative, and means for locking the hand wheel in its adjusted position.

10. In a radial drilling machine, the combination of a horizontal arm, a saddle slidably mounted thereon, a drill head' on the saddle and angularly adjustable therewith about a horizontal axis, a spindle rotatably mounted on the head, mechanism for moving the saddle along the arm comprising a hand wheel normally in a position in the path of the spindle when ,the latter is adjusted angularly and normally having its axis horizontal and perpendicular to the arm approximately, and means whereby'the hand wheel may be pivotally moved about an approximately vertical axis out of the said path.

11. In a radial drilling machine, the combination of a horizontal arm, a saddle slidably mounted thereon, a drill head on the saddle and angularly adjustable therewith about a horizontal axis, a spindle rotatably mounted on the head, mechanism for moving the saddle along the arm comprising a hand wheel, an an approximately horizontal shaft normally perpendicular to the arm, spiral ears connecting the two shafts and a ban wheel on the front end of the second shaft normally in a position in the path of the spindle when the latter is adjusted angularly, and means whereby the hand wheel ma be moved about the axisof the first sha t out of the said path and nevertheless remain operative.

In testimony whereof I hereto atfix my signature.

WILLARD T. SEARS.

approximately vertical shaft,. 

